WATCH | A lot of people have questions about what's going to happen to their health insurance and are calling their lawmakers demanding answers. Republican lawmakers, still trying to come up with a replacement plan, are now trying to reassure their constituents about the future of healthcare.

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Phones are ringing, and lawmakers are feeling the pressure

Several GOP staffers told Circa that lawmakers are getting calls from constituents who are worried they may lose their health insurance or not be able to pay for it once Obamacare is repealed.

One Republican aide told Circa that most of the calls they are receiving about Obamacare are from people who are worried about losing coverage over a pre-existing condition.

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Republican lawmakers have more to worry about

According to the Kaiser Family Foundation, there are 6.3 million Obamacare marketplace enrollees living in Republican districts, compared to 5.2 million in Democratic districts.

So if the Affordable Care Act is repealed without a replacement, Republican lawmakers will have more to answer for.

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Republicans don't have all the answers yet

GOP lawmakers returned to Washington this week after a three-day retreat in Philadelphia where they were supposed to be hashing out their policy game plan. But when it comes to healthcare reform, Republicans still don't know what their plan is.

Nor do they know what the White House has in store. When asked at the retreat whether or not he knew what President Trump was planning for healthcare replacement, Sen. James Risch of Idaho said, "in detail, no."

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Trump has already issued an executive order paving the way for Congress to repeal the law, but Sen. Susan Collins of Maine -- who has offered up her own replacement plan with Sen. Bill Cassidy of Louisiana -- admitted to reporters last week that the order is "very confusing."

Collins also said that lawmakers "really don’t know yet what the impact [of the executive order] will be."

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People aren't just worried about repeal

Republicans say that for every call or letter they get from a person who is worried about losing health insurance, they get just as many from people who can no longer pay for their coverage because their premiums have dramatically increased under Obamacare.

Insurance premiums increased by roughly 7.5 percent in 2015 and 2016, but they are expected in increase by an average of 22 percent in 2017, according to a report from the Department of Health and Human services.

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So what are lawmakers telling concerned constituents?

Republican lawmakers told Circa that they are reassuring concerned callers that no one is going to lose health coverage overnight, but that they are committed to repealing and replacing the law.

They are also warning callers not to take too much stock in the Democrats' talking points that millions of people could die without Obamacare and that Republicans want to "make America sick again."